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Head-to-head · Email Anti-Spam Software

MX Guarddog vs Sophos Email

  • Updated Sep 2026
  • Both researched from official sources
  • 3 checks side by side
Higher score MX Guarddog #2 in Email Anti-Spam Software 8.5/10 Free plan · paid from $0.25/mo · 30-day trial Free plan✓ 2 of 3 features Visit MX Guarddog
Sophos Email #8 in Email Anti-Spam Software 6.5/10 Pricing on request · 30-day trial ✓ 0 of 3 features Visit Sophos Email

MX Guarddog leads on 3 checks, Sophos Email on 0, and 0 are even. Who comes out ahead on the 3 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreMX Guarddog · 8.5/10
  • Free planonly MX Guarddog
  • Most featuresMX Guarddog · 2 of 3

MX Guarddog scores higher on our rubric for email anti-spam software: 8.5 against 6.5 out of 10; our editors rank them #2 and #8.

MX Guarddog offers free plan; Sophos Email doesn't. MX Guarddog offers phishing detection; Sophos Email doesn't publish it. MX Guarddog offers malware scanning; Sophos Email doesn't publish it.

MX Guarddog is the better fit for budget-conscious domain owners. Sophos Email is the better fit for organizations needing broad, modern email protection.

  • MX Guarddog fits best

    Budget-conscious domain owners

  • Sophos Email fits best

    Organizations needing broad, modern email protection

Advertiser disclosure: iTechGuides is reader-supported. We may earn a commission when you click some links. How we rank.

Side by side

Feature MX Guarddog 8.5/10 Visit ↗ Sophos Email 6.5/10 Visit ↗
At a glance
Editor score 8.5 6.5
Ranking #2 in Email Anti-Spam Software #8 in Email Anti-Spam Software
Best for Budget-conscious domain owners Organizations needing broad, modern email protection
Pricing model Free plan + paid Paid
Starting price Not published Not published
Free plan ✓ (best) —
Free trial — —
Free trial length 30 days · no card needed 30 days
Deployment Cloud Cloud
Platforms Web Web
Integrations 3 integrations 5 integrations
Features MX Guarddog 2/3 · Sophos Email 0/3
Phishing detection ✓ (best) Not published
Malware scanning ✓ (best) Not published
Attachment scanning Not published Not published
Specs
Quarantine access User_and_admin Not published
Supported mail platforms Standard SMTP email servers for owned domains; not consumer Gmail or Hotmail accounts Not published
Quarantine retention 7 days Not published
Deployment type Cloud_gateway Not published
Our review
Pros
  • Spam, phishing, malware and virus scanning
  • Quarantine access with message release and reports
  • 168-hour outage spooling with TLS encryption
  • AI detection covers phishing, malware, QR-code, and image-based threats
  • Combines sandboxing, URL protection, clawback, DLP, and encryption
  • Integrates with Microsoft 365, Google Workspace, Sophos MDR, and XDR
Cons
  • Does not support consumer Gmail or Hotmail accounts
  • Designed for owned domains using standard SMTP servers
  • Free access requires visible website text links to earn tokens
  • Pricing requires contacting sales
  • There is no perpetual free plan
  • Cloud deployment may not fit organizations requiring another deployment model
Our verdict

MX Guarddog is a hosted email security service for organizations, individuals and domain owners operating their own email servers. It routes incoming mail through MX Guarddog data centers, scans messages for spam, phishing, malware and…

Read the review →

Sophos Email is a cloud-managed email security product for business, educational, and government organizations. It protects mailboxes against phishing, business email compromise, spam, malicious URLs, malware, ransomware delivery, and…

Read the review →
  1. MX GuarddogEmail Anti-Spam Software 8.5Free plan · paid from $0.25/mo · 30-day trial
  2. Sophos EmailEmail Anti-Spam Software 6.5Pricing on request · 30-day trial

Strengths and trade-offs

  • MX Guarddog — where it wins

    • Spam, phishing, malware and virus scanning
    • Quarantine access with message release and reports
    • 168-hour outage spooling with TLS encryption

    Where it doesn't

    • Does not support consumer Gmail or Hotmail accounts
    • Designed for owned domains using standard SMTP servers
    • Free access requires visible website text links to earn tokens
  • Sophos Email — where it wins

    • AI detection covers phishing, malware, QR-code, and image-based threats
    • Combines sandboxing, URL protection, clawback, DLP, and encryption
    • Integrates with Microsoft 365, Google Workspace, Sophos MDR, and XDR

    Where it doesn't

    • Pricing requires contacting sales
    • There is no perpetual free plan
    • Cloud deployment may not fit organizations requiring another deployment model
  • MX Guarddog8.5/10 · Free plan · paid from $0.25/mo · 30-day trial

    A low-cost cloud gateway for domain owners who run their own email servers.

    Visit MX GuarddogFull verdict →
  • Sophos Email6.5/10 · Pricing on request · 30-day trial

    Broad cloud email protection spanning phishing, malware, impersonation, DLP, and encryption.

    Visit Sophos EmailFull verdict →

More comparisons

Reviewed by iTechGuides Editors · Editorial team · Updated Sep 2026

Last updated · How we research and update